Aww, you're giving me too much credit.
But as to your first question, yeah, I've had people suggest things that got me thinking and putting something in. Usually it's people just throwing out silly ideas of riffing on scenarios on the discord or something, or maybe something from a conversation somewhere. A lot of time nothing comes from it, but you never know if something comes up that fits my ideas for the story, or adds a nice little side gag or detail.
One example is where the
coven is all looking at one eye-phone, a reference to the mythological
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suggested by a friend, that was just to good to pass up. Another is when
Macy sits on the couch with the MC and gets excited over a suggestively narrated cooking show, giving, eh... rise to some serious pokeys which has her hurry out of the room in embarrassment. The
pokeys idea came up on discord and as I was just writing up the dialog at the time and it seemed like a funny thing to have happen, I added it.
Big or involved plot twists or attempts to shoe-horn in a favored kink out of the blue usually don't make it though, because I already have a pretty good idea of where I want to go with this, so even if I like the idea, the chance that something that big will fit in are slim.
As to your second question, I'm always happy to answer questions from people who write to me asking how to get started with daz3d or with making VNs in general. But I don't think so highly of my skills and even if I did, my duty is first and foremost to making the game (and finally finish this effin' chapter), so that is where my time must go first (and what little time I have left after that and my dayjob, I owe my wife). So you won't find me much on any learning platform or on the forums here or dedicated channels on some discords where skilled and passionate people already give out great advice, unless it's for picking up some skill or trick myself.